Observations of plasmarons in a two-dimensional system: Tunneling measurements using time-domain capacitance spectroscopy
Author(s)
Ashoori, Raymond; Dial, Oliver E.; Pfeiffer, L. N.; West, K. W.
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Calculations of the single-particle density of states (SPDOS) of electron liquids have long predicted that there exist two distinct charged excitations: the usual quasiparticle consisting of an electron or hole, and a plasmaron consisting of a hole resonantly bound to real plasmons in the Fermi sea. Using tunneling spectroscopy to measure the SPDOS of a 2D electronic system, we demonstrate the detection of a plasmaron in a 2D system in which electrons have mass. With the application of a magnetic field we discover unpredicted magnetoplasmarons which resemble Landau levels with a negative index.
Date issued
2012-02Department
Massachusetts Institute of Technology. Department of PhysicsJournal
Physical Review B
Publisher
American Physical Society
Citation
Dial, O. et al. “Observations of Plasmarons in a Two-dimensional System: Tunneling Measurements Using Time-domain Capacitance Spectroscopy.” Physical Review B 85.8 (2012). ©2012 American Physical Society
Version: Final published version
ISSN
1098-0121
1550-235X